219 lines
6.7 KiB
C
219 lines
6.7 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2023/12/29
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* Description : Main program body.
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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/*
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*@Note
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*Dual ADC regular simultaneous sampling routine:
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*ADC1 channel 1 (PA1), ADC2 channel 3 (PA3)), and the rule group channel obtains
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*dual ADC conversion data through DMA interrupt.
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*
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*Note:only applied to CH32V20x_D6
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*/
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#include "debug.h"
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/* Global Variable */
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u32 TxBuf[1];
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u16 Adc_Val[4];
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vs16 Calibrattion_Val1 = 0;
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vs16 Calibrattion_Val2 = 0;
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void DMA1_Channel1_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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/*********************************************************************
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* @fn ADC_Function_Init
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*
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* @brief Initializes ADC collection.
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*
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* @return none
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*/
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void ADC_Function_Init(void)
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{
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ADC_InitTypeDef ADC_InitStructure = {0};
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC2, ENABLE);
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RCC_ADCCLKConfig(RCC_PCLK2_Div8);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_3;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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ADC_DeInit(ADC1);
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ADC_DeInit(ADC2);
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ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;
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ADC_InitStructure.ADC_ScanConvMode = DISABLE;
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ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
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ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
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ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
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ADC_InitStructure.ADC_NbrOfChannel = 1;
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ADC_InitStructure.ADC_OutputBuffer = ADC_OutputBuffer_Disable;
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ADC_InitStructure.ADC_Pga = ADC_Pga_1;
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ADC_Init(ADC1, &ADC_InitStructure);
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ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_239Cycles5);
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ADC_DMACmd(ADC1, ENABLE);
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ADC_Cmd(ADC1, ENABLE);
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ADC_BufferCmd(ADC1, DISABLE); //disable buffer
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ADC_ResetCalibration(ADC1);
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while(ADC_GetResetCalibrationStatus(ADC1));
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ADC_StartCalibration(ADC1);
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while(ADC_GetCalibrationStatus(ADC1));
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Calibrattion_Val1 = Get_CalibrationValue(ADC1);
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ADC_Init(ADC2, &ADC_InitStructure);
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ADC_RegularChannelConfig(ADC2, ADC_Channel_3, 1, ADC_SampleTime_239Cycles5);
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ADC_SoftwareStartConvCmd(ADC2, ENABLE);
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ADC_Cmd(ADC2, ENABLE);
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ADC_BufferCmd(ADC2, DISABLE); //disable buffer
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ADC_ResetCalibration(ADC2);
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while(ADC_GetResetCalibrationStatus(ADC2));
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ADC_StartCalibration(ADC2);
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while(ADC_GetCalibrationStatus(ADC2));
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Calibrattion_Val2 = Get_CalibrationValue(ADC2);
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}
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/*********************************************************************
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* @fn DMA_Tx_Init
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*
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* @brief Initializes the DMAy Channelx configuration.
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*
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* @param DMA_CHx - x can be 1 to 7.
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* ppadr - Peripheral base address.
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* memadr - Memory base address.
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* bufsize - DMA channel buffer size.
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*
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* @return none
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*/
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void DMA_Tx_Init(DMA_Channel_TypeDef *DMA_CHx, u32 ppadr, u32 memadr, u16 bufsize)
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{
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DMA_InitTypeDef DMA_InitStructure = {0};
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
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DMA_DeInit(DMA_CHx);
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DMA_InitStructure.DMA_PeripheralBaseAddr = ppadr;
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DMA_InitStructure.DMA_MemoryBaseAddr = memadr;
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DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
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DMA_InitStructure.DMA_BufferSize = bufsize;
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DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
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DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
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DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
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DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
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DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
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DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
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DMA_Init(DMA_CHx, &DMA_InitStructure);
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NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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DMA_ITConfig(DMA1_Channel1, DMA_IT_TC | DMA_IT_HT | DMA_IT_TE, ENABLE);
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}
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/*********************************************************************
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* @fn Get_ConversionVal1
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*
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* @brief Get Conversion Value.
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*
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* @param val - Sampling value
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*
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* @return val+Calibrattion_Val - Conversion Value.
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*/
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u16 Get_ConversionVal1(s16 val)
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{
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if((val + Calibrattion_Val1) < 0)
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return 0;
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if((Calibrattion_Val1 + val) > 4095)
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return 4095;
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return (val + Calibrattion_Val1);
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}
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/*********************************************************************
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* @fn Get_ConversionVal2
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*
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* @brief Get Conversion Value.
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*
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* @param val - Sampling value
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*
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* @return val+Calibrattion_Val - Conversion Value.
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*/
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u16 Get_ConversionVal2(s16 val)
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{
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if((val + Calibrattion_Val2) < 0||val==0)
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return 0;
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if((Calibrattion_Val2 + val) > 4095||val==4095)
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return 4095;
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return (val + Calibrattion_Val2);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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USART_Printf_Init(115200);
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SystemCoreClockUpdate();
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Delay_Init();
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf( "ChipID:%08x\r\n", DBGMCU_GetCHIPID() );
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ADC_Function_Init();
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printf("CalibrattionValue1:%d\n", Calibrattion_Val1);
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printf("CalibrattionValue2:%d\n", Calibrattion_Val2);
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DMA_Tx_Init(DMA1_Channel1, (u32)&ADC1->RDATAR, (u32)TxBuf, 1);
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DMA_Cmd(DMA1_Channel1, ENABLE);
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while(1)
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{
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ADC_SoftwareStartConvCmd(ADC1, ENABLE);
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Delay_Ms(500);
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}
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}
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/*********************************************************************
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* @fn DMA1_Channel1_IRQHandler
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*
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* @brief DMA1_Channel1_IRQHandler Interrupt Service Function.
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*
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* @return none
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*/
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void DMA1_Channel1_IRQHandler()
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{
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if(DMA_GetITStatus(DMA1_IT_TC1) == SET)
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{
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DMA_ClearITPendingBit(DMA1_IT_GL1);
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Adc_Val[0] = TxBuf[0] & 0xffff;
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Adc_Val[1] = (TxBuf[0] >> 16) & 0xffff;
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printf("ADC1 ch2=%d\r\n", Get_ConversionVal1(Adc_Val[0]));
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printf("ADC2 ch3=%d\r\n", Get_ConversionVal2(Adc_Val[1]));
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}
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}
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